Positronium Formation with Trapped Electrons in n-Alkanes |
| B. Zgardzińska and T. Goworek
Institute of Physics, Maria Curie-Skłodowska University, pl. Marii Curie-Skłodowskiej 1, 20-031 Lublin, Poland |
| Received: March 17, 2010; in final form: December 5, 2010 |
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| Positronium (Ps) formation during self-irradiation by positrons was observed in n-alkanes of various carbon chain length. The rise of Ps intensity with time of irradiation is the result of positronium formation with trapped excess electrons. In the range T < 190 K the saturation value of positronium intensity changes with temperature mainly due to the change of positron mobility. With the increase of the irradiation dose the process of charging traps is slowing down and this effect is ruled mainly by interaction of excess electrons with ionization products during electron's migration to the traps. |
| DOI: 10.12693/APhysPolA.119.328 PACS numbers: 36.10.Dr, 36.20.Fz, 61.80.-x, 72.20.Jv, 78.70.Bj |